User blog comment:LegionZero/Nero's Parallels to Vergil and Sparda/@comment-967403-20140813075203/@comment-6769189-20140819060127

We also never hear that same instrumentation in regards to Nero again, it was also a remix of Spardas theme so maybe we are looking at it wrong and it was another remix of Spardas theme and not Nelo Angelos. So it could have been about the sword. Personally I consider Nero’s statement of power to be his own motivation, unrelated to other characters entirely because Nero has a motivation that no one else had. Even Vergil just wanted power to satisfy his insecurities but even then it would have been power for powers sake and there wasn’t anyone for him to protect. I also believe that Yamato connects Nero to Sparda more than Vergil because of all the similarities above to Sparda. There is also the possibility that Yamato has a natural attraction to those who want power, regardless of reason, but that wouldn’t explain why Vergil was the one to get it since it was (presumably) decided to be his at/around birth. There are a lot of possibilities that I think get overlooked that aren’t way out of this world (like the Yamato attraction I mentioned a few lines back)